EP 2581575 A4 20140507 - EXHAUST GAS PURIFIER FOR INTERNAL COMBUSTION ENGINE
Title (en)
EXHAUST GAS PURIFIER FOR INTERNAL COMBUSTION ENGINE
Title (de)
ABGASREINIGUNGSSYSTEM FÜR EINEN VERBRENNUNGSMOTOR
Title (fr)
PURIFICATEUR DE GAZ D'ÉCHAPPEMENT POUR MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
JP 2011069859 W 20110825
Abstract (en)
[origin: US2013047589A1] In an internal combustion engine, an upstream side air-fuel ratio sensor (23), hydrocarbon feed valve (15), exhaust purification catalyst (13), and the downstream side air-fuel ratio sensor (24) are arranged in an engine exhaust passage in that order from the upstream side. If hydrocarbons are fed from the hydrocarbon feed valve (15), the air-fuel ratio which is detected by the downstream side air-fuel ratio sensor (24) changes to the rich side from the reference air-fuel ratio which is detected when hydrocarbons are not fed from the hydrocarbon feed valve (15). The amount of hydrocarbons which are fed from the hydrocarbon feed valve (15) and which slip through the exhaust purification catalyst (13) is detected from the air-fuel ratio difference between the air-fuel ratio detected by the upstream side air-fuel ratio sensor (23) and the reference air-fuel ratio detected by the downstream side air-fuel ratio sensor (24).
IPC 8 full level
F01N 3/08 (2006.01); F01N 3/36 (2006.01); F01N 11/00 (2006.01); F02D 41/04 (2006.01)
CPC (source: EP US)
F01N 3/0814 (2013.01 - EP US); F01N 3/0842 (2013.01 - EP US); F01N 3/0871 (2013.01 - EP US); F01N 11/007 (2013.01 - EP US); F02D 41/0275 (2013.01 - EP US); F02D 41/1441 (2013.01 - EP US); F02D 41/1456 (2013.01 - EP US); F01N 2550/03 (2013.01 - EP US); F01N 2550/05 (2013.01 - EP US); F01N 2570/14 (2013.01 - EP US); F01N 2610/03 (2013.01 - EP US); F01N 2900/1402 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
No further relevant documents disclosed
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2013047589 A1 20130228; US 8707682 B2 20140429; BR 112012024807 A2 20160607; BR 112012024807 B1 20201215; CN 103097678 A 20130508; CN 103097678 B 20150408; EP 2581575 A1 20130417; EP 2581575 A4 20140507; EP 2581575 A8 20130828; EP 2581575 B1 20170524; ES 2629459 T3 20170809; IN 3419DEN2012 A 20151023; JP 5257551 B1 20130807; JP WO2013027300 A1 20150305; WO 2013027300 A1 20130228
DOCDB simple family (application)
US 201113502210 A 20110825; BR 112012024807 A 20110825; CN 201180004192 A 20110825; EP 11826140 A 20110825; ES 11826140 T 20110825; IN 3419DEN2012 A 20120419; JP 2011069859 W 20110825; JP 2012504212 A 20110825